/* CSS 变量定义 */
        :root {
            --my-blue: #0A68FF; --my-yellow: #FFC900; --my-dark: #1D2129; --my-text: #4E5969; --my-light-gray: #F7F8FA; --my-border-color: #E5E6EB;
            --bs-body-font-family: 'Roboto', 'Noto Sans SC', sans-serif;
            --bs-primary: var(--my-blue); --bs-primary-rgb: 10, 104, 255; --bs-warning: var(--my-yellow);
            --bs-body-color: var(--my-text); --bs-body-bg: #FFFFFF; --bs-link-hover-decoration: none;
            --fengrui-primary-blue: #0A2540;
            --fengrui-accent-yellow: #FFB800;
        }
        
        /* 基础样式 */
        body { font-weight: 400; scroll-behavior: smooth; min-height: 100vh; display: flex; flex-direction: column; }
        a, .btn, .nav-link, .navbar-brand { transition: all 0.3s ease; }

        /* 导航栏样式 */
        .navbar { padding: 1rem; transition: background-color 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease; }
        .navbar-transparent { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
        .navbar-scrolled { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 4px 12px rgba(0,0,0,0.06); padding-top: 0.5rem; padding-bottom: 0.5rem; }
        .navbar .navbar-nav .nav-link { color: var(--my-dark) !important; }
        .navbar .navbar-nav .nav-link:hover,
.navbar .navbar-nav .nav-link.active {
    color: var(--my-blue) !important;
}
        .navbar #brand-logo-text { color: var(--my-dark) !important; }
        .navbar-scrolled .navbar-nav .nav-link { color: var(--my-dark) !important; }
        .navbar-scrolled .navbar-nav .nav-link:hover { color: var(--my-blue) !important; }
        .navbar-scrolled #brand-logo-text { color: var(--my-dark) !important; }
        .navbar-brand img { 
    transition: filter 0.4s ease; 
    width: 240px !important; 
    height: 45px !important; 
    object-fit: contain; 
    /* filter: invert(1) brightness(0.5) sepia(1) hue-rotate(190deg) saturate(5); */ 
}
        /* .navbar-scrolled .navbar-brand img { filter: invert(1) brightness(0.5) sepia(1) hue-rotate(190deg) saturate(5); } */
/* 移除LOGO滤镜效果，保持原始颜色 */
        .navbar .nav-link { font-size: 1rem; font-weight: 500; padding: 0.5rem 1rem !important; position: relative; }
        .navbar .nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
        .navbar .nav-link:hover::after, .navbar .nav-link.active::after { width: 50%; }
        .navbar .nav-link.active { color: var(--my-primary) !important; font-weight: 600; position: relative; }
        .navbar .nav-link.active::after { content: ''; position: absolute; bottom: -5px; left: 50%; transform: translateX(-50%); width: 30px; height: 2px; background-color: var(--my-primary); border-radius: 1px; }
        .navbar-scrolled .nav-link.active { color: var(--my-yellow) !important; }
.navbar-scrolled .nav-link.active::after { background-color: var(--my-blue); }
        
        .dropdown { position: relative; }
        
        /* 下拉菜单样式 */
        .dropdown-menu { 
            background-color: rgba(255, 255, 255, 0.95); 
            backdrop-filter: blur(10px); 
            border: 1px solid var(--my-border-color); 
            border-radius: 8px; 
            box-shadow: 0 8px 25px rgba(0,0,0,0.15); 
            margin-top: 0;
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            z-index: 1000;
            min-width: 200px;
        }
        .dropdown:hover .dropdown-menu { display: block; }
        .dropdown-menu:hover { display: block; }
        /* 添加一个不可见的桥接区域，防止鼠标过快移出导致菜单消失 */
        .dropdown::before {
            content: '';
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            height: 10px;
            background: transparent;
            z-index: 999;
        }
        .dropdown:hover::before { display: block; }
        .dropdown-item { 
            color: var(--my-dark); 
            font-weight: 500; 
            padding: 0.75rem 1.5rem; 
            transition: all 0.3s ease;
            display: block;
            width: 100%;
            clear: both;
            text-align: inherit;
            white-space: nowrap;
            background-color: transparent;
            border: 0;
        }
        .dropdown-item:hover, .dropdown-item:focus { 
            background-color: var(--my-light-gray); 
            color: var(--my-blue);
            text-decoration: none;
        }
        .dropdown-toggle::after { display: none; }
        .navbar-toggler { border: none !important; }
        .navbar-toggler:focus { box-shadow: none !important; }
        .navbar-toggler .bi-list { font-size: 2rem; color: var(--my-dark); transition: color 0.4s ease; }
        .navbar-scrolled .navbar-toggler .bi-list { color: var(--my-dark); }
        
        /* 移动端底部导航栏 */
        .mobile-bottom-nav { 
            background-color: #fff; 
            padding: 0.75rem 1rem; 
            border-top: 1px solid var(--my-border-color); 
            box-shadow: 0 -4px 12px rgba(0,0,0,0.05); 
            z-index: 1050; 
        }
        .mobile-bottom-nav .btn { font-weight: 700; border-radius: 50px; padding: 0.75rem 1.25rem; }
        .mobile-bottom-nav .btn-warning { background-color: var(--my-yellow); color: var(--my-dark); border: none; }
        
        /* 首屏轮播图区域 */
        #first-screen-wrapper { height: 92svh; display: flex; flex-direction: column; background-color: #0d2c54; }
        @media (min-width: 992px) { #first-screen-wrapper { height: 100vh; } }
        #heroCarousel { flex-grow: 1; height: 0; position: relative; }
        #heroCarousel, .carousel-inner, .carousel-item { height: 100%; }
        #heroCarousel .carousel-item img, #heroCarousel .carousel-item video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(0.7); }
        #heroCarousel .carousel-caption { position: absolute; bottom: 15%; left: 10%; right: auto; text-align: left; width: 80%; max-width: 700px; padding: 2rem; background: rgba(0, 0, 0, 0.2); border-radius: 8px; backdrop-filter: blur(5px); }
        #heroCarousel .carousel-caption h5 { font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 700; }
        #heroCarousel .carousel-caption p { font-size: clamp(1rem, 2vw, 1.2rem); font-weight: 300; margin-top: 1rem; }
        .carousel-indicators { bottom: 20px; }
        .carousel-indicators [data-bs-target] { width: 30px; height: 4px; border-radius: 2px; background-color: rgba(255, 255, 255, 0.5); opacity: 1; border: 0; margin: 0 5px; }
        .carousel-indicators .active { background-color: var(--my-blue); }
        .carousel-control-prev-icon, .carousel-control-next-icon { width: 3rem; height: 3rem; background-size: 60% 60%; background-color: rgba(255, 255, 255, 0.1); border-radius: 50%; }
        #slogan-banner { background-color: #0d2c54; padding: 1rem 0; flex-shrink: 0; }
        .slogan-text { font-family: 'Ma Shan Zheng', cursive; color: #fff; font-size: clamp(2rem, 4vw + 1rem, 3.5rem); font-weight: normal; letter-spacing: 0.15em; text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3); }
        
        /* 移动端响应式样式 */
        @media (max-width: 991.98px) {
            .navbar-brand-centered { position: absolute; left: 50%; transform: translateX(-50%); }
            .navbar .nav-link.active::after, .navbar .nav-link:hover::after { width: 0; }
            #heroCarousel .carousel-item { min-height: auto; }
            
            /* 侧边栏菜单 (Offcanvas) */
            .offcanvas { 
                background-color: #FFFFFF; 
                --bs-offcanvas-width: clamp(260px, 75vw, 280px); 
                --bs-offcanvas-transition: transform .4s ease-in-out; 
            }
            .offcanvas-header { border-bottom: 1px solid var(--my-border-color); padding: 1rem 1.5rem; }
            .offcanvas-title { color: var(--my-dark); font-weight: 500; font-size: 1.1rem; }
            .offcanvas-header .btn-close { background-image: var(--bs-btn-close-bg); }
            .offcanvas-body { 
                padding: 0 !important; 
                display: flex; 
                flex-direction: column; 
                overflow: hidden;
                padding-bottom: 3rem !important;
            }
            .offcanvas .navbar-nav { padding: 2rem 1.5rem; flex-grow: 1; overflow-y: auto; -ms-overflow-style: none; scrollbar-width: none; }
            .offcanvas .navbar-nav::-webkit-scrollbar { display: none; }
            .offcanvas-footer-info { margin-top: auto; padding: 1.5rem; border-top: 1px solid var(--my-border-color); flex-shrink: 0; text-align: center; }
            .offcanvas .nav-item { margin-bottom: 2rem; }
            .offcanvas .nav-link { color: var(--my-dark) !important; font-size: 1.5rem; font-weight: 500; padding: 0.5rem 0 !important; position: relative; display: inline-block; width: auto; }
            .offcanvas .nav-link::after { content: ''; position: absolute; bottom: -8px; left: 0; transform: none; width: 0; height: 2px; background-color: var(--my-blue); transition: width 0.3s ease; }
            .offcanvas .nav-link:hover::after, .offcanvas .nav-link.active::after { width: 40px; }
            .offcanvas .nav-link.active { color: var(--my-yellow) !important; font-weight: 700; }
            .offcanvas-footer-info .contact-item { display: flex; align-items: center; justify-content: center; gap: 0.75rem; font-size: 0.9rem; color: var(--my-text); margin-bottom: 0.8rem; }
            
            /* 移动端子菜单样式 */
            .offcanvas .submenu { 
                list-style: none; 
                padding-left: 0; 
                margin-top: 1rem; 
                margin-bottom: 1rem; 
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease-out;
            }
            .offcanvas .submenu.show {
                max-height: 300px;
                transition: max-height 0.3s ease-in;
            }
            .offcanvas .submenu li { 
                margin-bottom: 1rem; 
            }
            .offcanvas .submenu-link { 
                font-size: 1.2rem !important; 
                color: var(--my-text) !important; 
                font-weight: 400 !important; 
                padding-left: 1.5rem !important; 
                position: relative; 
            }
            .offcanvas .submenu-link::before { 
                content: '•'; 
                position: absolute; 
                left: 0.5rem; 
                color: var(--my-blue); 
                font-weight: bold; 
            }
            .offcanvas .submenu-link:hover, .offcanvas .submenu-link.active { 
                color: var(--my-blue) !important; 
            }
            /* 移动端产品中心下拉图标样式 */
            .offcanvas .nav-link .bi-chevron-down {
                font-size: 1.3rem;
                margin-left: 0.5rem;
                color: var(--my-blue);
                opacity: 0.8;
                transition: transform 0.3s ease;
            }
            .offcanvas .mobile-dropdown-toggle.active .bi-chevron-down {
                transform: rotate(180deg);
            }
            .offcanvas .mobile-dropdown-toggle {
                cursor: pointer;
            }
            .offcanvas-footer-info .contact-item small { display: block; color: var(--my-dark); font-weight: 500; border-top: 1px solid var(--my-border-color); margin-top: 0.75rem; padding-top: 0.75rem; }
            .offcanvas-footer-info .company-name { 
                color: var(--fengrui-primary-blue); 
                font-weight: 400; 
                border-top: 1px solid var(--my-border-color); 
                margin-top: 0.75rem; 
                padding-top: 0.3rem; 
                font-size: 0.85rem; 
                text-align: center; 
                letter-spacing: 0.3px;
                background: linear-gradient(135deg, var(--fengrui-primary-blue), var(--my-blue));
                -webkit-background-clip: text;
                -webkit-text-fill-color: transparent;
                background-clip: text;
            }
            .offcanvas-footer-info .contact-item.address-item { align-items: flex-start; }
            #back-to-top-btn { bottom: 100px; } 
        }

        /* 面包屑导航区域样式 */
        .breadcrumb-section {
            background: linear-gradient(135deg, var(--my-blue) 0%, var(--fengrui-primary-blue) 100%);
            /* 更新：减小了垂直内边距，降低高度 */
            padding: 70px 0 30px; 
            margin-top: 76px; /* 为固定的导航栏预留空间 */
            position: relative;
            overflow: hidden;
        }
        
        .breadcrumb-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
            opacity: 0.3;
        }
        
        .breadcrumb-section .container {
            position: relative;
            z-index: 2;
        }
        
        .breadcrumb {
            background: none;
            padding: 0;
            margin-bottom: 1rem;
        }
        
        .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .breadcrumb-item a:hover {
            color: white;
        }
        
        .breadcrumb-item.active {
            color: white;
        }
        
        .breadcrumb-item + .breadcrumb-item::before {
            content: ">";
            color: rgba(255, 255, 255, 0.6);
        }
        
        .page-title {
            color: white;
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 0;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        }
        
        @media (max-width: 768px) {
            .breadcrumb-section {
               /* 更新：对应减小移动端的高度 */
               padding: 50px 0 20px;
            }
            
            .page-title {
               font-size: 2rem;
            }
        }

        /* “关于我们”页面样式 */
        #about {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        }
        
        #about h2 {
            color: var(--my-dark);
            font-weight: 700;
        }
        
        #about .lead {
            color: var(--my-blue);
            font-weight: 500;
        }
        
        #about p {
            color: var(--my-text);
            line-height: 1.8;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--fengrui-primary-blue);
            margin-bottom: 1rem;
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: var(--my-text);
            margin-bottom: 2rem;
        }
        
        .section-description {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--my-text);
        }
        
        .business-card {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #f0f0f0;
        }
        
        .business-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.15);
        }
        
        .business-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--my-blue), var(--fengrui-primary-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        
        .business-icon i {
            font-size: 2rem;
            color: white;
        }
        
        .business-card h4 {
            color: var(--fengrui-primary-blue);
            font-weight: 600;
            margin-bottom: 1rem;
        }
        
        .business-card p {
            color: var(--my-text);
            line-height: 1.6;
            margin-bottom: 1.5rem;
        }
        
        .business-features {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .business-features li {
            padding: 0.5rem 0;
            color: var(--my-text);
            border-bottom: 1px solid #f0f0f0;
            position: relative;
            padding-left: 1.5rem;
        }
        
        .business-features li:before {
            content: "▶";
            position: absolute;
            left: 0;
            color: var(--my-blue);
            font-size: 0.8rem;
        }
        
        .business-features li:last-child {
            border-bottom: none;
        }
        
        .advantage-item {
            padding: 2rem 1rem;
        }
        
        .advantage-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--fengrui-accent-yellow), #ffd700);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
        }
        
        .advantage-icon i {
            font-size: 1.8rem;
            color: var(--fengrui-primary-blue);
        }
        
        .advantage-item h5 {
            color: var(--fengrui-primary-blue);
            font-weight: 600;
            margin-bottom: 1rem;
        }
        
        .advantage-item p {
            color: var(--my-text);
            line-height: 1.6;
        }
        
        /* 手风琴/折叠面板样式 */
      .accordion-button {
        background-color: #f8f9fa;
        border: none;
        color: var(--my-primary);
        font-weight: 500;
      }
      
      .accordion-button:not(.collapsed) {
        background-color: var(--my-primary);
        color: white;
        box-shadow: none;
      }
      
      .accordion-button:focus {
        box-shadow: 0 0 0 0.25rem rgba(10, 104, 255, 0.25);
      }
      
      .accordion-item {
        border: 1px solid #dee2e6;
        margin-bottom: 0.5rem;
        border-radius: 0.375rem;
        overflow: hidden;
      }
      
      .accordion-body {
        background-color: #fff;
        color: #666;
        line-height: 1.6;
      }
        
      /* 联系方式行动号召(CTA)样式 */
      #contact-cta {
        background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
        border-top: 1px solid #dee2e6;
        border-bottom: 1px solid #dee2e6;
      }

      #contact-cta .btn {
        border-radius: 6px;
        font-weight: 500;
        padding: 0.5rem 1.5rem;
        transition: all 0.2s ease;
      }

      #contact-cta .btn:hover {
        transform: translateY(-1px);
      }
      
      /* 开始：美化后的微信二维码弹窗样式 */
      #wechatModal .modal-content {
          background: rgba(255, 255, 255, 0.7);
          -webkit-backdrop-filter: blur(20px);
          backdrop-filter: blur(20px);
          border: 1px solid rgba(255, 255, 255, 0.2);
          border-radius: 24px;
          box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
          overflow: hidden;
      }

      #wechatModal .modal-header {
          border-bottom: none;
          padding: 1.5rem 1.5rem 0;
          display: flex;
          flex-direction: column;
          align-items: center;
          position: relative;
      }

      #wechatModal .wechat-icon {
          font-size: 2.5rem;
          color: #07c160;
          margin-bottom: 0.75rem;
      }
      
      #wechatModal .modal-title {
          font-size: 1.1rem;
          font-weight: 600;
          color: var(--fengrui-primary-blue);
          text-align: center;
          width: 100%;
          margin: 0;
      }

      /* 更新：优化关闭按钮样式，使其更显眼 */
      #wechatModal .btn-close {
          position: absolute;
          top: 1rem;
          right: 1rem;
          background-color: rgba(0, 0, 0, 0.2); /* 更深的背景色 */
          border-radius: 50%;
          width: 36px;
          height: 36px;
          opacity: 0.9; /* 更不透明 */
          transition: all 0.3s ease;
          filter: invert(1) grayscale(100%) brightness(200%); /* 将图标 'X' 变为白色 */
      }

      #wechatModal .btn-close:hover {
          background-color: rgba(0, 0, 0, 0.35); /* 悬停时背景更深 */
          opacity: 1;
          transform: rotate(90deg);
      }

      #wechatModal .modal-body {
          padding: 1rem 2rem 2.5rem;
          text-align: center;
      }

      #wechatModal .qr-container {
          position: relative;
          display: inline-block;
          padding: 8px; /* 为辉光效果预留空间 */
          border-radius: 20px;
          margin-bottom: 1.5rem;
          background: linear-gradient(145deg, rgba(255,255,255,0.6), rgba(255,255,255,0.2));
          box-shadow: 0 10px 30px rgba(0,0,0,0.1);
      }

      /* 辉光边框效果 */
      #wechatModal .qr-container::before {
          content: '';
          position: absolute;
          top: 0; left: 0; right: 0; bottom: 0;
          border-radius: 20px;
          border: 2px solid transparent;
          background: conic-gradient(from 180deg at 50% 50%, #07c160, var(--my-blue), #07c160) border-box;
          -webkit-mask:
              linear-gradient(#fff 0 0) padding-box, 
              linear-gradient(#fff 0 0);
          -webkit-mask-composite: destination-out;
          mask-composite: exclude;
          animation: spin 3s linear infinite;
      }

      @keyframes spin {
          to { transform: rotate(1turn); }
      }
      
      /* 更新：更大的二维码尺寸 */
      #wechatModal .qr-placeholder {
          width: 180px;
          height: 180px;
          border-radius: 14px;
          overflow: hidden;
          position: relative;
          cursor: pointer;
          background-color: white; 
      }
      
      /* 悬停时的扫光效果 */
      #wechatModal .qr-placeholder::after {
          content: '';
          position: absolute;
          top: 0;
          left: -100%;
          width: 100%;
          height: 100%;
          background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
          transition: left 0.6s ease;
      }

      #wechatModal .qr-placeholder:hover::after {
          left: 100%;
      }

      #wechatModal .qr-code-img {
          width: 100%;
          height: 100%;
          object-fit: contain;
          border-radius: 12px;
      }
      
      #wechatModal .scan-instruction {
          font-size: 0.95rem;
          color: #2c3e50;
          margin-bottom: 0.25rem;
          font-weight: 500;
      }
      
      #wechatModal .contact-info {
          font-size: 1rem;
          font-weight: 600;
          color: #07c160;
          margin: 0;
          letter-spacing: 1px;
          user-select: all;
      }
      
      /* 弹窗入场动画 */
      #wechatModal.fade .modal-dialog {
          transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.4s ease-out;
          transform: translateY(-40px) scale(0.95);
          opacity: 0;
      }

      #wechatModal.show .modal-dialog {
          transform: translateY(0) scale(1);
          opacity: 1;
      }

      /* 响应式布局调整 */
      @media (max-width: 480px) {
        #wechatModal .modal-dialog {
            margin: 1rem;
            max-width: calc(100vw - 2rem);
        }
        #wechatModal .modal-body {
            padding: 0.75rem 1rem 1.5rem;
        }
        /* 更新：调整移动端二维码尺寸 */
        #wechatModal .qr-placeholder {
            width: 150px;
            height: 150px;
        }
      }
      /* 结束：美化后的微信二维码弹窗样式 */

      /* 社交媒体图标悬停效果 */
      .footer .d-flex a {
        color: #6c757d;
        transition: all 0.3s ease;
        padding: 8px;
        border-radius: 50%;
      }

      .footer .d-flex a:hover {
        color: #007bff;
        background-color: rgba(0,123,255,0.1);
        transform: translateY(-2px);
      }

      .footer .d-flex a[title="微信"]:hover {
        color: #07c160;
        background-color: rgba(7,193,96,0.1);
      }

      .footer .d-flex a[title="抖音"]:hover {
        color: #ff0050;
        background-color: rgba(255,0,80,0.1);
      }

      .footer .d-flex a[title="邮件"]:hover {
        color: #dc3545;
        background-color: rgba(220,53,69,0.1);
      }

      @media (max-width: 768px) {
        #contact-cta .btn {
          width: 100%;
          margin-bottom: 0.5rem;
        }
        
        #contact-cta .btn:last-child {
          margin-bottom: 0;
        }
      }
        
        @media (max-width: 768px) {
            .about-hero-section {
                padding: 80px 0 30px;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .stat-number {
                font-size: 2rem;
            }
            
            .business-card {
                margin-bottom: 2rem;
            }
        }
        
        main {
            flex-grow: 1;
        }

        .new-footer { background-color: var(--fengrui-primary-blue); color: rgba(255, 255, 255, 0.7); padding: 3rem 0; font-size: 0.9rem; }
        .new-footer h3, .new-footer h4 { color: #fff; font-family: 'Noto Sans SC', sans-serif; font-weight: 500; }
        .new-footer a { color: rgba(255, 255, 255, 0.7); text-decoration: none; transition: color 0.3s ease; }
        .new-footer a:hover { color: var(--my-yellow); }
        .new-footer .list-unstyled li { margin-bottom: 0.5rem; }
        .new-footer .small { color: rgba(255, 255, 255, 0.7); }
        .new-footer hr { border-color: rgba(255, 255, 255, 0.15); }
        #back-to-top-btn { position: fixed; bottom: 25px; right: 25px; width: 50px; height: 50px; background-color: var(--fengrui-accent-yellow); color: var(--fengrui-primary-blue); border: none; border-radius: 50%; font-size: 1.5rem; display: none; align-items: center; justify-content: center; cursor: pointer; z-index: 1080; opacity: 0; visibility: hidden; transform: translateY(20px); transition: all 0.3s ease; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
        #back-to-top-btn.show { display: flex; opacity: 1; visibility: visible; transform: translateY(0); }
        #back-to-top-btn:hover { background-color: var(--fengrui-primary-blue); color: var(--fengrui-accent-yellow); }
        @media (max-width: 991.98px) { #back-to-top-btn { bottom: 100px; } }